- Polling Compilation: Billionaires Income Tax
- Data for Progress: Taxing Billionaires is Extremely Popular
- Forward Majority/Change Research: BBB & BIT Poll in Four Senate Battleground States, Oct. 27, 2021
- Forward Majority/Change Research: Supermajority & Bipartisan Support for the Billionaires Income Tax, Oct. 2021
- Global Strategy Group: West Virginia Poll, Sep. 29, 2021